The product sets Princeton against US-based Newton Peripherals, which launched its tiny MoGo Dapter back in January, though it's not due to go on sale until sometime this coming autumn. It too supports Bluetooth 2.0+EDR. It measures 1.8 x 0.9 x 0.7cm and weighs 2.5g.

Newton's MoGo Dapter

Next we have Logitech's alternative, announced in July and due to go on sale this month, potentially making it the first of the three to arrive. It's adaptor will ship with the new VX Nano cordless mouse.